A Mobile Ad-hoc NETwork (MANET) is a collection of wireless mobile nodes forming a temporary network without using any centralized access point, infrastructure, or centralized administration of the mobile networks .Data transmission between two nodes requires multiple hops as nodes transmission range is limited in Mobile Ad-hoc NETworks (MANET's). Mobility of the networks nodes to makes the situation even more complicated in wireless networks. Multiple routing protocols find optimized routes from a source to some destination. This paper presents performance analysis of three different routing protocols AODV, DSR and ZRP. This paper mainly focuses on comparing the performance analysis of three routing protocols for Mobile Ad-hoc NETworks (MANET's).